hi, thanks for replies.
I was first using xintensity -1, after reading sxemini reply I used xintensity 78 which indeed lowered the stales and a little the hash rate. now around 75.5mh/s which is still better than what I had (73.4mh/s with nbminer)

now I have 13 stales for 141 shares.
https://imgur.com/a/hHhg7CD

I will have to continue lower xintensity for stales to disappear I guess. fair enough.
I didn't find out the fixes for stats and api tho. maybe I should try to use 11_4 or 11_2 ?

anyway great miner, tbh I'm not the best tester, but definitively best hash rate perf I ever got so far.